<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="http://localhost:3000/login" method="post">
    <div>
        用户名:<input name="username"/>
    </div>
    <div>
        密码:<input name="password"/>
    </div>
    <div>
        <button type="submit">登录</button>
    </div>
</form>
</body>
</html>